linuxbridge plugin: can't ping subnet gateway

I installed openstack-grizzly on ubuntu server 13.04 using https://github.com/ilearnstack/cloudgear
This installation uses Linuxbridge. I created an internal network 192.168.0.0/24 . I am able to ping dhcp server which has the ip 192.168.0.3 but not the internal router 192.168.0.1. What am I missing here ? Below is the list of interfaces and bridges.

Comments

thanks for the reply. Do i have make any changes in the interfaces file? I am just using one nic.
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet static
address 10.35.141.91
netmask 255.255.255.0
gateway 10.35.141.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 10.35.141.1
this is the configuration of the interfaces file